The correct answer is (B) To notice or distinguish differences between, or among, things, persons, or groups. To accurately observe differences between, or among. To make a choice in favor of, or against, someone or something, on the basis of the group or category to which he, she, or it belongs.

Examples of use:

• Discriminate between the sexes here and you will be fired.
• In addition, it is not acceptable to discriminate on the basis of age.