Which of the Following Statements About Fruit Ripening Is an Example

Which of the following statements about fruit ripening is an example of positive feedback?

A) Chemical signals increase enzymatic activity in fruit to convert sugars into starches, thicken pulp, and maintain color in the fruit.
B) Once seeds reach maturity, chemical signals block enzymatic steps that normally convert sugars into starches, and sugars accumulate from photosynthetic activity within the fruit.
C) Chemical signals stimulate enzymatic activities that convert starches into sugars, soften fruit pulp, and produce more chemical signals.
D) Chemical signals shut down enzymatic activities that convert starches into sugars, soften fruit pulp, and color change of fruit.