Restrictive related Clause provides essential information
Tear is to sorrow as smile is to <u>joy</u> or <u>happiness</u>.
To tear usually means to be sad, or have sorrow. Smiling is an expression of happiness or joy.
Hope this helped :) <-- Joy :P
The correct answer is B! :)
have you tried looking the word up in the Dictionary? if that doesnt help much, you can guesstimate the word by searching it in the thesaurus! it will give you synonyms of the word.
hope that helps!