Which of the Following Students Provides the Most Accurate Information

Which of the following students provides the most accurate information about expertise during problem solving?

A) Lisa: "Experts are better at estimating how long it would take nonexperts to solve a problem."
B) Pernelle: "Experts are more likely to use a mental set."
C) Jack: "Experts are more likely to use their top-down processing effectively."
D) Sabino: "Experts are more likely to use serial processing."