Make a check by the correct sentence.
1. a. she leaned her bike against a tree, but the bike wouldn’t stand up.
b. she leaned her bike against a tree, but it wouldn’t stand up.
a. a is correct.
b. b is correct.
c. both a & b are correct.
d. both a & b are incorrect.

Hi !

A- She leaned her bike against a tree, but the bike wouldn't stand up.

B- She leaned her bike against a tree, but it wouldn't stand up.

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A and B are both correct grammatically.

A repeats twice the word "bike" and you don't have to over-use the word since you can replace it by the personal pronoun "it" (B).

Unless, you want to insist on the noun "bike", for some reasons

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☺☺☺

make no change because everything else is correct

caliban is prospero's slave in the shakespear's play "the tempest"