A: Yes. You can come as a business visitor to examine or monitor a potential investment if you otherwise qualify for B status. But you cannot start actively running the U.S. business or doing productive work while you are in B-1 status.
Sources: U.S. Department of State, B-1 Business Visa Fact Sheet: https://travel.state.gov/content/travel/en/us-visas/business/b-1-fact-sheet.html
9 FAM 402.2, Visitors for Business and Pleasure: https://fam.state.gov/FAM/09FAM/09FAM040202.html