Question 1 15 pts Pick up the three correct answers from below. You do not need to evaluate all these integrals. We can use method of substitution to find 5ac4 ( 205 + e " )9 dac O dx = Ine* + C O 3e? In a dx = 23 + C Of 3(23 + ac)2 dac = (203 + 20)3 + C O We can use method of substitution to find S x vac - 2 dac. O This is an appropriate substitution to find the the integral. dx = 4 - 1 du x+1