Question

13/18 when do you use this type of rule: there were punch, cookies, and cake at the party. when you are trying to do stuff when stating an introductory phrase when separating a quote from a clause when you have a list of things

Explanation:

The sentence "There were punch, cookies, and cake at the party" lists multiple items (punch, cookies, cake). The rule here is about using commas to separate items in a list. So we need to find the option that matches this context. The option "When you have a list of things" describes the situation where we use commas to separate items in a list, which fits the sentence. The other options: "When you are trying to do stuff" is too vague, "When stating an introductory phrase" is about a different comma usage (like after an introductory phrase e.g., "In the morning, I go for a walk"), and "When separating a quote from a clause" is about commas with quotes (e.g., "He said, 'Hello'", which is not the case here).

Answer:

D. When you have a list of things (assuming the last option is D, if the options are labeled as A, B, C, D with the last one being "When you have a list of things")