Laura's encyclopedias
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Laura sells encyclopaedias, and her monthly income has two components, a fixed component of $1000, and a variable component of $C for each set of encyclopaedias that she sells in that month over a sales target of n sets, where n>0. How much did she earn in March?

Here are two additional details:

(1) If Laura had sold three fewer sets in March, her income for that month would have been $600 lower than it was.

(2) If Laura had sold 10 sets of encyclopaedias in March, her income for that month would have been over $4000.

As your answer, pick the statement below that best reflects your analysis of the problem:

A. statement (1) alone is sufficient, but statement (2) alone is not sufficient.

B. statement (2) alone is sufficient, but statement (1) alone is not sufficient.

C. both statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. each statement ALONE is sufficient.

E. statements (1) and (2) TOGETHER are NOT sufficient.

Please only input the letter of statement (i.e. your answer box should contain 1 upper case letter ONLY).