Answer:
The correct answer is Option A.
Step-by-step explanation:
Because of the given polt, we know we're looking for a function f(x) such as:
[tex]f(0)=1[/tex]
Notice that this is true for options a and d, ruling out options b and c.
Now, we also know that the function we're looking for has a period of:
[tex]6\pi[/tex]
This way, we'll know that the correct answer is:
Option A.
