Scdoris has been born with condition that limits her vision. a) achromatopsia, a b)achromatopsia. a c)achromatopsia; a d)achromatopsia a fill in the blank with the correct punctuation usage.

You need a slight stop there to collect your thoughts, especially when the next word is achromatopsia. That makes D wrong.

If you use B, " A medical condition that limits her vision" is not a sentence. So B shouldn't be the answer. Fragments are used by very good writers usually in fiction, and this statement is not part of something that is fictional.

A semicolon separates two equal clauses. You can think of it as meaning "and" or even "but" sometimes. You have the same problem with C as you do with B. So C is not correct.

That leaves us with A. That should be your answer.You need a pause of some kind and that pause is proved by the comma. The sentence is not a run on sentence just one in need of a pause in the middle.

answer: b. the moon is much smaller than the earth.

explanation:

it starts off by comparing the earth and venus. it also only says one sentance about the moon which make it the odd one out. in conclusion the answer is b.