The correct option is B. veer.
In this sentence, "veer" is the simple predicate. <u>A simple predicate is the main verb that in the predicate, which generally tells what the subject is doing</u>. In this case, the main verb ("veer") is referring to an activity of "hurricanes", the subject of the sentence. Moreover, this is a complex sentence since it includes an independent clause ("Hurricanes sometimes veer off course") and a dependent clause ("Although meteorologist work hard to predict hurricanes’ paths"), which cannot stand by itself as the independent clause. <u>The simple predicate is part of the independent clause</u>.
