Is an example of a google filetype operator.
a.
pdf
b.
html
c.
text
d.
all of the above

d. all of the above

Explanation:

Google filetype operator enables restricting the search results to the specified file type. For example if you are searching for Eiffel Tower and you want to restrict the results to pdf files then the query will be of the form Eiffel Tower filetype:pdf . Similarly for text file results you need to specify the search query as Eiffel Tower filetype:text. The Google filetype operator supports several different file types.

the answer would be 2

since they are only saying that the couple has 20 daughters and so on but they never said that they went to the movies as well therefore the couple was the only people that went to the movies.

hope this ! : 3