Viga Has Been Studying for Three Hours Now and Is

Viga has been studying for three hours now and is getting overwhelmed with all of the statistics and formulas she has learned. Although she has been taking short breaks, she is tired and getting frustrated. Instead of quitting, however, Viga decides to take a short walk and then get right back into learning her statistics. Which of the following components of motivation best describes Viga's determination to stick to her studying?

A) activation
B) persistence
C) intensity
D) assimilation