Singling students out: What it means? Why it not good idea to use these?

The correct answer is B.

The data would be more valid if she made the observations daily for two months.

A student began conducting an investigation about the preferences of bees. She conducted the number of wildflowers in a small pot and created the following table. Plant Species Number of Plants Dandelion 13 Indian paintbrush 8 Queen Anne’s lace 20 Thistle 29 She planned to observe the flowers for the next five days for an hour at the same time each afternoon. The data would be more valid if she made the observation daily for 2 months