Which of the following concatenates the "Do they live in" message, the contents of the String state variable, and a question mark? a. "Do they live in" & state & b "?" b. "Do they live in & state & "?" c. Do they live in & state &? d. "Do they live in" # state # "?" Which of the following methods temporarily converts the string stored in the item variable to lowercase? a. item. Lower b. item. ToLower c. Lowercase(item) d Lower (item) If a check box is selected, its ____ property contains the Boolean value True. a. Checked b. Checkbox c Selected d Selection