Why "shouldered" is used in this sentence?

[Mickey]

English Language Tests, Intermediate level

ESL/EFL Test #722 "Real Life: Using Body Parts as Verbs (2)", question 1

He was really aggressive the other night. He just pushed and ......... his way through the large crowd until he reached the front of the stage. I was kind of embarrassed to be with him.

(a) shouldered
(b) armed
(c) mouthed
(d) necked

English Language Tests, Intermediate level

ESL/EFL Test #722 "Real Life: Using Body Parts as Verbs (2)", answer 1

He was really aggressive the other night. He just pushed and shouldered his way through the large crowd until he reached the front of the stage. I was kind of embarrassed to be with him.

Correct answer: (a) shouldered

Your answer was: correct
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Can someone explain why "shouldered" is used in this sentence, please?

[Mister Micawber]

shoulder: verb (used without object)
22. to push with or as if with the shoulder: to shoulder through a crowd.
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Native English teacher at Mister Micawber's