Judgement of multiple keywords and matching options

Multiple keywords, keywords matching options, phrase match,

[thefish]

Hey guys,
I've been looking for several hours to answer for the following questions. If anyone can help me, I would be grateful!

If I have the keyword "mountain bike" in a phrase match, would it appear for the term "mountain bikes"?

AND

If I have the two keywords together in a group (mountain bike and mountain bikes) on BROAD match. both are with bids of $0.50. now, the user is clicking a term like: "buy mountain bikes". which one of the keywords would be charged?

Or what if I have the keyword: "bikes" in broad and the term "mountain bikes" in phrase, and the user clicks: "mountain bikes". which one of the keywords would be charged?

[cyberandroid]

a) no
b) the second broad match is much more likely to be charged
c) the phrase match is much more likely to be charged

[smallcompany]

... but you're never sure until you start using all matches, divide them into different groups, and enter exact and phrase negatives.

[thefish]

Thank you Cyberandroid,
regarding the first question, can you please refer me to the place where you get your answer?

More likely means it would be charged if the bid is the same? what if the bid is more? where can I find those rules?

[cyberandroid]

the rules
[adwords.google.com...]

[PPC Consultant]

you can create a unique url for each kw. Then you would not worry about which KW is getting clicked..