If Sonja performs first, which one of the following must be true?

liwenong28 on October 1, 2020

C vs E

Hi! I was in between C and E and can I please have an explanation why E is the correct answer? Thanks in advance.

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Emil-Kunkin on June 26, 2023

Hi, let's see what we know if S is first. We know that T must be before H, and that H is before R. We also know that T must be before G from the contrapositive of rule 2. So, we know that t must be second.