Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.

[Q]: Problem: if x 2 + kx - 3, is divisible by ( x - 1 ), what is the value of k
Options: a. - 1, b. 1, c. 2, d. - 1, e. 0
[A]: c


[Q]: Problem: what is the value of n if the sum of the consecutive odd intergers y from 1 to n equals 169 ?
Options: a. 47, b. 25, c. 37, d. 33, e. 29
[A]: b


[Q]: Problem: how long does a train 110 m long running at the speed of 72 km / hr takes to cross a bridge 136 m length ?
Options: a. 82.1 sec., b. 12.3 sec, c. 19.1 sec., d. 17.1 sec., e. 42.1 sec.
[A]:
b