Answer:
D. They wanted to expand their power in the world.
Explanation:
The age of Discovery is considered to roughly start from early fifteenth century and continue into the early seventeenth century. During this age the rulers sponsored explorers considering the political and trade benefits which unknown lands could offer them..
Options A, B, and C are incorrect because the journeys' main purpose was political and economic.
A well-known alchemist and only known maker of the Philosopher's Stone, a legendary substance with incredible powers.
Answer:
A. The results of the experiment showed a quantifiable decrease in oxygen levels.
Explanation:
The chosen sentence possesses a formal register with technical vocabulary related to science, which can be understood by professional scientists. For instance, the words <em>quantifiable </em>and <em>decrease </em>have a more academic style. Besides, the writing is impersonal and written in the third person.
The rest of the options are incorrect because they have contractions and they are too informal. Thus, their vocabulary contain casual expressions which do not follow the conventions of an academic style.