In this sentence, commas should be used to separate different items in the list. Option C uses the comma correctly after every item in the list, before the conjunction "and". The other options either do not use the comma or use the comma incorrectly, going against standard English norms.

According to Standard English conventions, the proper use of commas in this sentence is to place them around the transitional word "finally" which functions as a parenthetical expression. The commas separate "finally" from the rest of the sentence, making it clear that it is providing additional information to the reader. The other options either lack commas entirely or place them incorrectly, breaking the sentence's flow and making it difficult to read. Option C uses the commas correctly, separating "finally" and maintaining the sentence's readability and proper sentence structure.

According to Standard English conventions, the proper use of commas in this sentence is to separate the various activities. Option A does not include any commas in the last part of the sentence, as none are needed. The other options either add unnecessary commas or place them incorrectly, making the sentence difficult to read and understand. Option A maintains the proper sentence structure and provides clear communication of the listed activities.

According to Standard English conventions, the proper use of commas in this sentence is to place them around the transitional word "however" which functions as a parenthetical expression. The commas separate "however" from the rest of the sentence, making it clear that it is providing additional information to the reader. The other options either lack commas entirely or place them incorrectly, breaking the sentence's flow and making it difficult to read. Option B uses the commas correctly, separating "however" and maintaining the sentence's readability and proper sentence structure.

In this sentence, no commas are needed apart from the ones already present in the preceding clauses. Option A reflects this and follows the standard English conventions by not including any additional commas. The other options add unnecessary commas, disrupt the flow of the sentence, and make it difficult to read.