Among the following which are the floral rewards offered by plants pollinated by insects to its pollinators.
A. Nectar 
B. Pollen grains 
C. Providing safe places for laying eggs.
D. Fragrance

In most of the insect pollinated plants the rewards offered by the flowers to its pollinators are nutrient rich pollen and nectar. In some plant like Amorphophallus and Yucca flowers offer safe place to the insect to deposit eggs which are protected from predators.