Select the adverb clause from the drop-down menu to complete the sentence.

scientists raised the black-footed ferrets in captivity

a) until the ferrets could return to the wild.

b), which control the prairie-dog population.

c), ensuring the species' survival.

d) because of their status as an endangered species.

For anyone wondering what the answer is it is

a) until  the ferrets could return to the wild

until the ferrets could return to the wild.

Explanation:

Btw i took the test and that is the right answer for anyone owho needs it in the future

x=4, y=4

step-by-step explanation:

y=2x-4;

x+2y=12

we can use substitution since the first equation is solved for y

where ever you see y in the second equation, replace it with 2x-4

x + 2(2x-4) = 12

distribute the 2

x+4x-8 = 12

combine like terms

5x-8=12

add 8 to each side

5x-8+8=12+8

5x=20

divide by 5

5x/5 = 20/5

x =4

we still need to solve for y

y = 2x-4

we know x =4

y = 2(4) -4

y = 8-4

y=4