Which example of observations would provide a scientist with the best data for planning a new investigation about plant growth?
A: The scientist observed that, after exactly four weeks, the lima bean plant labeled "C" in soil was 3.25
inches taller than the other plants.
B: The scientist observed that after exactly four weeks, the bean plant in the darker soil was about 3
inches taller than the other plants.
C: The scientist observed that after about a month, the green plant in some soil looked taller than the
rest of the plants.
D: The scientist observed that after about 30 days, the bean plant labeled "C" in the soil was a couple of
inches taller than most of the other plants.
HEL