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20z2 Evaluate the integral: V4 - 22 (A) Which trig substitution is correct for this integral? Or = 4 sec(0) Or = 4tan(0) Or = 4sin(0) Or = 2 sin(0) Ox = 2tan(0) Ox = 2sec(0) B) Which integral do you obtain after substituting for a and simplifying? Note: to enter 0, type the word theta. () 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