Which One of the Following Is a Well-Written Objective for an Activity

Multiple Choice

Which one of the following is a well-written objective for an activity?

A) Students will play a bingo game in which math fact questions are called out.
B) When shown rock samples in their natural setting, students will point to three examples of each of the three basic types of rocks (igneous, sedimentary, and metamorphic) .
C) Students will write a topic sentence.
D) Students will practice labeling the parts of speech we have been studying.