Question

fix any punctuation or capitalization errors below. click \submit answer\ if there are none.
if mbaku shows up too early the surprise will be ruined.

Explanation:

The sentence "If M'Baku shows up too early the surprise will be ruined" is a complex sentence with a dependent clause ("If M'Baku shows up too early") and an independent clause ("the surprise will be ruined"). A comma is needed to separate the dependent clause from the independent clause when the dependent clause comes first. So we add a comma after "early".

Answer:

If M'Baku shows up too early, the surprise will be ruined.