C looks to be right, normally when ¨and¨ theres no comma, but when there are two sentences theres normally a comma. plus when saying a title theres normally a :
In many instances, absolute dating is considered more accurate than relative dating because it gives a specific time or age to an event or object but with an accuracy that varies with the particular technique and <span>particular object.</span>
I used an external USB in my computer yesterday.
Hope this helps!
