Because she wrote it very well
The correct answer is: [B]: "semicolon" .
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<u>Note</u>:
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Choice: [A]: "comma" — is INCORRECT. Note that placing a "comma" would result in an error known as "comma splice".
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Choice: [C]: "period" — is INCORRECT. Note that placing a "period" would be incorrect. Doing so would result in a new sentence that does not begin with a capital letter.
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Choice: [D]: "no punctuation is needed" —is INCORRECT. Note that if the statement were left alone, the statement would be a "<u>run-on sentence</u>".
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The correct answer is: [B]: "semicolon". If a new sentence could be formed; and if the ideas could connect; it is acceptable to place a "semicolon" between the "two potential statements to form one statement" ; and to NOT CAPITALIZE the first word of the "second [potential sentence]" —<u>unless</u> that "[second potential sentence] begins with a proper pronoun.
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I would go with B, or Ways to build immunity to diseases. Why? Well, just by using the word biology, we can use process of elimination. The prefix “bio” means life, so C and D already would be out. The suffix “ology” means the study of, so the word biology means the study of life. Because biology often has to do with diseases and finding cures to sustain human life spans, the only logical answer would be B. A would make no sense in terms of biology.
You have to take pictures of your spelling