In Kaya's teacher's desk there are 10 pink highlighters, 15 yellow highlighters, and 8 blue highlighters. How many highlighters are there in all?	Select the correct option.
A) 11
B) 22
C) 77
D) 33
E) 88

Rationale: "add the numbers of highlighters . 10 + 15 + 8 = 33 . answer is d ."
Answer: D