What caused young Charles Dickens to go to work in a boot polish factory?

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1 point
His parents wanted to teach him the value of work.
His writing had been rejected by publishers and he had no other options.
He had to support his family.
He was a poor student, and he dropped out of school.

His father, John Dickens, was imprisoned for not paying his debts, so Charles was sent to work in a boot polish factory to help support his family.