Problem: Do "Madonna" and "she" point to the same thing in the following sentence?

Madonna fired her trainer because *she* couldn't stand her boyfriend.
****
A: yes

Problem: Do "Terpsichore" and "it" point to the same thing in the following sentence?

The actress used to be named Terpsichore , but she changed it to Tina a few years ago, because she figured *it* was easier to pronounce.
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A: no

Problem: Do "The delivery truck" and "it" point to the same thing in the following sentence?

The delivery truck zoomed by the school bus because *it* was going so slow.
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A: no

Problem: Do "mothers" and "They" point to the same thing in the following sentence?

The mothers of Arthur and Celeste have come to the town to fetch them. *They* are very happy to have them back, but they scold them just the same because they ran away.
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A:
yes