M
1) Can you pass . . . . . . . . salt, please?
Explanation :
The indefinite articles 'a' and 'an' are not used for nouns that are uncountable or cannot be counted. The noun here, 'salt' is an uncountable noun. The noun mentioned here is known by both the speaker as well as the listener, hence the article 'the' is used and is the correct answer.