What makes Mary Cassatt a trailblazer
There is nothing but
The little boy jumped up and down.
There's no prepositional phrase in that.
If you have more sentences and I will put answers in Ask for details.
A is correct. Quotation marks always enclose the sentence being spoken, and there should be a space to indicate a new speaker.
It has become one of the most obvious clichés in international politics: the United States and China have the most important bilateral relationship in the world. What is not so obvious is the nature of that relationship. Until recently, most observers were willing to settle for an accurate but inelegant description: that the countries are neither friends nor foes. Do you need to prepare the paper on this topic? I believe you can find many points related your topic at Primewritings site. They have got the blog with the writing tips and qualified writers.