The word British should be capitalized.
The 'B' should be capitalised.
Yes. It should be --- British Colonial Policy.
Yes, you should capitalize "About" in a title.
Yes, you should capitalize the C in Century.
A preacher should preach as long as he is under the power of the Holy Ghost.
No, you should not. You should only capitalize a word when it is at the start of a sentence or when it is a proper noun.
You should capitalize Colosseum when referring to the specific ancient Roman amphitheater in Rome.
Yes, you should capitalize "The Rotunda" as it is a specific place or location.
no
No
No
It should not be capitalized.