The Following Two Statements Refer to the Length of an A/B

Multiple Choice

The following two statements refer to the length of an A/B test.
I.The length of an A/B test should reflect the amount of time required
For participants to take action.
II.The length of an A/B test should reflect the amount of time required
For a sufficient sample size to be obtained.
How many,if any,of these statements is (are) true?

A) I only
B) II only
C) I and II are both true
D) Neither I nor II are true