Two hypotheses that can be supported with quantitative data are:
1. Increased consumption of sugary drinks leads to an increased risk of obesity.
2. Higher levels of physical activity lead to lower levels of stress.
As for Dorothy's assignment as a medicinal chemist in a pharmaceutical company, it is most likely that she is tasked with researching and developing new molecules for medication.
Option D, "to research molecules in spider venom for new pain medication," is a possible assignment for her as it aligns with her job description and the nature of the pharmaceutical industry.
Hence the option is D