What effect does the use of capital letters have on a search?

Using all caps will always give you more results than searching without capital letters.
It doesn't make any difference if you use capitals or not in most search engines.
In most search engines, it limits your search to only pages that also capitalize those words.
It makes the search more urgent, so you'll get your results quicker.

Question

What effect does the use of capital letters have on a search?

Using all caps will always give you more results than searching without capital letters.
It doesn't make any difference if you use capitals or not in most search engines. 
In most search engines, it limits your search to only pages that also capitalize those words.
It makes the search more urgent, so you'll get your results quicker.

anonymous · Answer

B. Capitals do not make a difference to most search engines