Which of the following is a way to get more sleep?

a. read a tablet before going to bed.
b. sleep in later on the weekends to make up for lost sleep during the week.
c. exercise regularly.
d. both a and c

You want to do as much exercise you can do right before you sleep and make sure to stay up all night talking with your friends or watch a movie at 3am... B

You want to limit how much screen time you get when you go to bed.. Exercising makes you more tired and more fatigued. Which allows you pass out faster. The answer would be C, but double check just to be sure. I have seen questions like this with D being correct some times. 

It would be 23 beats per second

As long as it was one lick and the dog is a bigger dog, it should be fine. watch it carefully for a few days.