Pls help

42 2 Evaluate the integral: dx V4 - 2-2 (A) Which trig substitution is correct for this integral? Ox = 4sec(0) Ox = 4tan(0) Ox = 4 sin(0) Ox = 2tan(0) Ox = 2sec(0) Ox = 2 sin(0) (B) Which integral do you obtain after substituting for a and simplifying? Note: to enter 0, type the word theta. (C) What is the value of the above integral in terms of 0? + C (D) What is the value of the original integral in terms of a