Consider these string arrays A = {"a", "m","x", "z"}, B = {"d", "k", "m", "n", "Y"} Which one of the following operations is performed to get the elements of an array C=("a", "m", "X",z). Select one: O Concat O Intersect O Union O Except One of the following is a correct statement to read data from a file into a string variable str. Select one: O Streamreader.str None of these O Streamreader.ReadLine(str) O Str=streamreader.ReadLine Which one of the following Property that determines the length of time the tooltip remain visible? Select one: Auto PopDelay Interval O AutoDelay O None of these