Consider the following statements regarding the crassulacean acid metabolism (CAM) plants and choose the correct answer:
1. CAM plants can synthesize large amounts of malic and isocitric acids at night
2. These are found in dry habitats
3. These are succulents with thick fleshy leaves, or, when leaves are absent, a swollen photosynthetic stem
4. These plants are generally slow growing

A. 1, 2, 3 and 4 are true

B. Only 1 and 2 are true

C. Only 3 and 4 are true

D. Only 1, 3 and 4 are true

Answer: Option A