社会资本简单再生产的基本实现条件是( )。

A．Ⅰ(v+=Ⅱc

B．Ⅰ(c+v+=Ⅰc+Ⅱc

C．Ⅱ(c+v+=Ⅰ(v++Ⅱ(v+

D．Ⅰ(v+△v+m/=Ⅱ(c+△

Now that you’ve gotten a little more confident, we’re going to give you the opportunity to practice "without the training wheels." When you want to check your work, you can turn to the solutions at the end. If you aren’t familiar with some of the mathematical concepts, make a note to pay particular attention to that chapter in this book; this practice set covers a wide range of topics tested on the GMAT.
On all data sufficiency problems, the answer choices are the same (as you’ve learned). We’ve put them here for your reference.
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.

There are twenty students in a class, all of whom scored between 0 and 100 on their final exams. If the class average was 85, how many people scored below the average score on the exam
(1) Twelve people in the class scored higher than an 85.
(2) The lowest eight scores added up to 640.