Question

which is a run-on sentence?
alex takes spanish lessons after school from ms. goodwin.
jackie went to the movies yesterday she watched a long cartoon.
elizabeth visited her grandmother in arizona last year.
lewis mopped the floor on saturday and then he washed the dishes.

Explanation:

A run-on sentence incorrectly joins two independent clauses (complete thoughts) without proper punctuation or a coordinating conjunction. The blue option has two independent clauses ("Jackie went to the movies yesterday" and "she watched a long cartoon") joined only by a space, making it a run-on. The other options are either single independent clauses or properly joined clauses.

Answer:

B. Jackie went to the movies yesterday she watched a long cartoon.