Place parentheses, if needed, to make each of the following equations true. a. 2+7 436 c. 5+ 4+9+6=3 b. 28 4+1 8 d. 5+ 6+2+4=12 a. Choose the correct answer below. OA. Parentheses are needed. The corrected equation is (2+7+4)=36. OB. Parentheses are needed. The corrected equation is (2+7) 4 = 36. OC. Parentheses are needed. The corrected equation is 2+ (7.4) = 36. OD. Parentheses are not needed to make the equation true. h Cheece the correct answer below