Pg 644 (576) - Q5
The pattern repeats in sets of 3, so dividing 19 by 3 to get a remainder
of 1, the 19th term in the pattern would be the first in the set, or -1.
3 goes into 17 five times with a remainder of 2, so the 17th term is the
second in the set, or 1, which is larger than -1,
making B the answer.