Final answer:
Mrs. Garrett's blood pressure was lower yesterday compared to today's high reading of 160/110 mm Hg. The only possible reading from yesterday, which is lower but still shows hypertension, is 155/105 mm Hg.
Step-by-step explanation:
The question concerns Mrs. Garrett's blood pressure reading, which is markedly higher today at 160/110 mm Hg than yesterday. To determine which reading below was from yesterday, we look for a value lower than today's but not lower than normal blood pressure levels.
Normal blood pressure is less than 120/80 mm Hg, and hypertension is generally considered to be 140/90 mm Hg or above. Given the options presented, the only possible reading from yesterday would be 155/105 mm Hg, which is option B. This reading is less than today's reading but still elevated, indicating hypertension.