Agardener grows asters, a long-day plant, in his greenhouse. this plant grows well in summer. which method will ensure that the asters grow all year round?

a. break the darkness period with a flash of light for some time, so that the plants can bloom all year round.

b. break the light period with complete darkness for some time, so that the plants can bloom all year round.

c. increase the shade in the greenhouse so that the plants can bloom all year round.

A. Break the darkness period with a flash of light for some time, so that the plants can bloom all year round.

Explanation:

AS they are summer plants they will need tons of heat and light in order to bloom, so the heat is provided already by the greenhouse, we have to just maje sure that the metabolism of the plant is set up as if it were summer by having light in the dark and with that expanding the day-time of the winter to make the plant think that it´s summer.