Final answer:
Without the specific conditional statement, it is not possible to determine which branch will execute for a userage of 20. In general, the true branch executes when the condition is met, and the false branch executes when the condition is not met.
Step-by-step explanation:
To determine whether the true or false branch executes when userage is 20, we need to know the conditional statement being evaluated. In programming, a conditional statement typically involves an if-else construct where a condition is checked. If the condition is met (true), the first block of code (the true branch) will execute; if the condition is not met (false), the second block of code (the false branch) will execute.
For example, if the conditional statement is if userage >= 18, then the true branch will execute since the userage, being 20, is greater than or equal to 18. Conversely, if the conditional statement is if userage < 20, the false branch will execute because userage is not less than 20 but exactly equal to it.