In context of the passage as a whole, the quotation from Mushotzky in lines 52-54 serves mainly to A)defend the work of the researchers against the potential criticisms of other scientists.
B)explain why the researchers were able to interest relatively few other scientists in their work.
C)suggest a particular scientific process that the researchers eventually adapted and refined for their work.
D)emphasize a significant scientific challenge that the work of the researchers ultimately surmounted.

Which techniques best describe the tone the author is using in this passage?

The library carries many current books.what is the adjective

When lawrence saw the posters for the circus hanging on the bulletin board, as he swept up the trimmings at slim's barbershop, he knew he would be taking his little cousins. they loved animals, and he was looking forward to seeing the smiles on their faces as the circus performers amazed them with their stunts. but sweeping up hair clippings didn't pay a whole lot. lawrence spent 45 dollars just getting tickets. but it was worth it to see his cousins' faces. the day finally came and everyone was excited as they walked into that big circus tent. but lawrence soon realized that he and his cousins would be thirsty and hungry. as they sat in their seats, the drink vendor walked by selling beverages. desperately thirsty, lawrence asked him how much a lemonade would cost, and the drink vendor said, "eleven dollars each." lawrence replied, "oh, that's it? just eleven dollars? what a great deal for one cup of lemonade. that's totally worth it." the drink vendor walked away. which type of irony is used?