Read the passage below and choose the best answer that expresses the main idea of the passage: People concerned with the environment and global warming usually try to reduce their carbon output by increasing
their home's energy efficiency and driving less. Some start by calculating their carbon footprint to set a benchmark --
like a weigh-in before a diet. A carbon footprint is simply a figure -- usually a monthly or annual total of CO2 output
measured in tons.
a.
Everyone should reduce their carbon
output.
C. People concerned with global warming
should know their carbon footprint so they
will know how they can reduce their carbon
output.
d. Everyone puts out tons of CO2 into the
atmosphere every day,
b. You should always calculate your carbon
footprint before going on a diet.

How does federalism limit the power of government in the united states? a. it requires the national government to share power with state governments. b. it ensures that one state cannot make laws that affect all the other states. c. it requires the three branches of the national government to share powers. d. it allows the judicial branch to rule on laws that affect the entire country.

Does this sound good? hey great britain, we need to talk. we’ve been through a lot these past couple of years and i don’t think that i would’ve made it this far without you but, i think it’s time that i tried to. don’t get me wrong, i think you’re a pretty great country! you’re smart, you’re funny, you're rich, and very dominant but, these past couple of years you’ve been a little too dominant. as each year goes by you become more and more self-absorbed. you’re only concerned about your own well-being. for example, when we get into arguments you always raise the taxes on paper and tea prices; it just isn’t fair. not only are you selfish but, you always want your buddies around. it’s not very fun cleaning up after you and your british soldiers (you guys never put the toilet seat down). they’re always popping up unexpected, and you always force me to let them stay for a couple of days. not to mention how irresponsible you are. i don’t like it when you force some of your responsibility on me. it’s not my fault that you got yourself into another war so, why should i have to pay for it? listen, in the beginning, what we had was good but, you and i aren’t so compatible anymore. i think it’s best if i took some time to be independent and think for myself for once. -yours truly, the states

Push-and-pull factors contribute to