Noa is conducting a single-blind procedure that tests a new antacid. Given this, which of the following statements BEST describes what's going on in Noa's work? Group of answer choices Only the researchers know who received the antacid and who received the placebo. Both the researchers and the participants know who received the antacid and who received the placebo. Neither the researchers nor the participants know who received the antacid and who received the placebo. Only the participants know who received the antacid and who received the placebo