Can someone answer? i have 50 minutes so dont hurry :)

The pka of three different c―h bonds is given below. explain the observed trend in pka. select the single best answer.

What recommendations would you give to your local community to to decrease the local effects of human impact on the environment? list 2 recommendations and how they will positively impact your community. 3. what recommendations would you give to the global governments to decrease the global effects of human impact on the environment? list 2 recommendations and how they will positively impact our planet.

Which of the following most likely contributed to the outbreak of world war ii? a. embargoes on international trade b. higher tariff rates in european countries c. sanctions imposed by the united states d. global economic depression