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The best answer to this question is D.
Answer: Singular Verbs
Explanation:
Subjects and verbs must AGREE with one another in number (singular or plural). Thus, if a subject is singular, its verb must also be singular; if a subject is plural, its verb must also be plural. Verbs REMOVE an s from the singular form.
Answer:
1.) Primary Source
2.) All of them
3.) Beliefs
Explanation:
Primary sources provide a first-hand account of an event or time period and are considered to be authoritative. They represent original thinking, reports on discoveries or events, or they can share new information. ... Secondary sources involve analysis, synthesis, interpretation, or evaluation of primary sources.
Beliefs is the plural of a noun belief. Believes is the use of a verb believe in third-person singular simple present.