Evaluating a logic circuit expression
Suppose AB = 1. This implies that A = 1 and B = 1. What is the value of A + B in this case?

Also, be aware that some people naturally use "or" to mean one or the other, but not both. That is not the definition used in scientific contexts like this, though. Here both inputs can be true and the "or" will still also be true. Only pointing this out in case you are using the former definition.