To adopt a dog from an animal shelter, you must pay $90 for vaccinations, $75 to spay or neuter the dog, and $40 for a wellness exam by a veterinarian. a. Write an expression in the simplest form that represents the amount (in dollars) it costs to adopt x dogs.

An expression is __ dollars.

What does the coefficient of the expression in part (a) represent?

A. the total amount (in dollars) the veterinarian is paid when one dog is adopted

B. the total cost (in dollars) of adopting one dog

C. the total amount (in dollars) the animal shelter earns when x dogs are adopted

D. the total cost (in dollars) of adopting x dogs