Choice "B" is correct. Of the choices listed, the best one is "tR34ju78" because it contains a combination of small letters, capital letters, and numbers. This password would be the most difficult to "crack."
Choice "a" is incorrect. "trjunpgs" is not the best password because it is all small letters and not a combination of small letters, capital letters, and numbers.
Choice "c" is incorrect. "34787761" is not the best password because it is all numbers and not a combination of small letters, capital letters, and numbers.
Choice "d" is incorrect. "tr34ju78" is not the best password because it is just small letters and numbers and not a combination of small letters, capital letters, and numbers.