Which of the following shows the comma(s) in the right position(s)?

A. Juan, and Mason play well together.
B. Jimmy closed his eyes, and counted to twenty.
C. Jose, Juan, Mason, and Jimmy all went swimming.
D. The reason, that he is late, is that he got caught in heavy traffic.

C. although it is deemed not totally necessary after Mason these days.

Sra

The correct answer is:

C. Jose, Juan, Mason, and Jimmy all went swimming.

To determine the correct position of commas, it is important to understand the rules of comma usage. Commas are typically used to separate items in a list, to separate clauses, and to set off introductory phrases or nonessential information.

Let's analyze each option:

A. Juan, and Mason play well together.
This sentence is not correct because there is a comma after "Juan" but no comma before "and." The correct sentence should be "Juan and Mason play well together" without any commas.

B. Jimmy closed his eyes, and counted to twenty.
This sentence is not correct because there is a comma after "eyes" but no comma before "and." The correct sentence should be "Jimmy closed his eyes and counted to twenty" without any commas.

C. Jose, Juan, Mason, and Jimmy all went swimming.
This is the correct sentence. The commas are correctly placed to separate the items in the list, which are the names of the individuals.

D. The reason, that he is late, is that he got caught in heavy traffic.
This sentence is not correct because it uses unnecessary commas. The phrase "that he is late" is essential to the sentence and should not be set off by commas. The correct sentence would be "The reason that he is late is that he got caught in heavy traffic" without any commas.

Therefore, option C is the correct answer as it correctly uses commas to separate the items in the list.