Answer:
b.gibberellins is the correct answer.
Step-by-step explanation:
Gibberellins are the plant growth hormones that are used to stimulate seed germination and elongation.
When gibberellins are sprayed in sugarcane crops it increases the sugar cane length, growth, and production.
Gibberellins are found in plant tissues such as flowers, shoots, and fresh leaves.
Gibberellic acid is used in horticulture/agriculture to increase the yields of crops.