Here is the original item:
As Alex navigated the narrow row of
chairs. (A)
His heavy book bag bumped the large soda perched on Teresa's
desk,
(B) sending
a shower of diet cola into the girl's
lap,
(C) soaking
her jeans.
You wanted to do this:
As Alex navigated the narrow row of chairs. His heavy book bag bumped the
large soda perched on Teresa's desk. Sending
a shower of diet cola into the girl's lap,
soaking her jeans.
A period after desk makes a fragment. Sending a shower of diet cola ... is a participle phrase, which cannot stand alone as a complete sentence.
You might want to review the rules.