While you do not have to use bullet points in your cover letter, the most compelling reason you may choose to use them is:

Group of answer choices

a$.$ You can simply copy and paste them over from your resume

b$.$ Cover letters are long and bullet points are easier to read

c$.$ You can $$pluck$$ words from the job description and write short $(2-3$ sentence$)$ stories that illustrate how you$$ve demonstrated the skill they are seeking

d$.$ Bullet points show that you know how to correctly format a document