Choose the one underlined word or phrase (A., B., C., or D.) that must be changed for the sentence to be correct.
1. Bitter feelings among the American colonists were caused of the Stamp Act of 1765, which
A
B
с
required that all legal documents bear stamps that were bought from the government.
D
2. Oil varnishes are made out hard gum or resin dissolved in oil, and they dry to a thin, hard, glossy
B
С
D
film.
3. In the early 1900s, investigations were made of the role played chromosomes, bodies discovered
A
B
to exist in the nucleus of all living cells.
С
D
4. Using carbolic acid as an antiseptic together with heat sterilization of instruments, Joseph Lister
A
B
С
dramatically decreased the number deaths following surgery.
D
5. Artificial selection, the selection of individuals that are best suited for a specific purpose, is
A
B C
common of plant and animal breeding.
D
6. The undersea mountains off the coast of Oregon resemble the Hawaiian Islands, which are
A
B
volcanoes that grew up the ocean floor to eventually break surface.
D.​