Question 14 Di 5 pts 0 1 0 Details 15 Evaluate the integral: I'VE' + 81 (A) Which trig substitution is correct for this integral? Of = 81 sec(@) Or = 81 sin(0) Or = 81 tan(0) Of = 15 sec(8) Or = 9tan(#) Or = 9sin(@) (B) Which integral do you obtain after substituting for & and simplifying? Note: to enter 8, type the word theta. de (C) What is the value of the above integral in terms of of + C (D) What is the value of the original integral in terms of x? + C