Question

which of the following is a simple sentence?
flannel shirts and pumpkin pie can only mean one thing: fall!
its fall, so i wear flannel shirts and bake pumpkin pie.
when its fall, its time for flannel shirts and pumpkin pie.
fall means flannel shirts and pumpkin pie.

Explanation:

A simple sentence has one independent clause.

• "Flannel shirts and pumpkin pie can only mean one thing: fall!" has a colon which is a complex structure.
• "It's fall, so I wear flannel shirts and bake pumpkin pie." is a compound sentence (two independent clauses joined by "so").
• "When it's fall, it's time for flannel shirts and pumpkin pie." has a dependent clause ("When it's fall").
• "Fall means flannel shirts and pumpkin pie." has one independent clause.

Answer:

Fall means flannel shirts and pumpkin pie.