Fill in the blank in the following phrase with the appropriate indefinite article below. jumeau. A. Les
B. Des
C. Un
D. Le

Here, "jumeau" is in a singular form (plural : jumeaux)

So we can eliminate "les" and "des" because they are plural.

The exercise asks an indefinite article and "le" is definite (le = the)

So the answer is "un" (un = a)

:)

for an essay you should be giving 300 points