While it is highly recommended that women trying to conceive take enough of this vitamin, fortification across the board of many food products is hotly debated because it can mask a dangerous B12 deficiency. a) Thiamin
b) Vitamin A
c) Biotin
d) Folate

The answer is option D.

Hope this helps you

it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.