While genetic modification of food has numerous advantages, some people are concerned about the potential of genetically modified crops to add vitamin and mineral supplements to food.
target harmless insects unintentionally.
help clean up pollution in contaminated soil.
resist extreme temperature changes.

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?