If you have a dual-alternative decision (you want to perform one action when a Boolean expression evaluates as true and an alternate action when it evaluates as false), you can use a(n) statement.

if-else  

Explanation:

A dual-alternative decision structure is a structure that includes a single or a group statement.  

There are two statements:

True and false

The true statement is that statement that includes one statement or block of the statement.  

A false statement is that statement that includes two statements or block of statement

Mike has a choice of an account that compounds daily and an account that compounds monthly. If they both have the same interest rate, which will earn more interest?

Account that is being compounded on a daily basis will earn more interest. This is because in simple words, one is getting some interest on a daily basis and one will yield an 'interest on interest'. Whereas in a monthly compounded account Mike will earn less interest.