The weakest point of Darwinism was that it had no explanation for:

Options

A. Struggle for existence
B. Survival of the fittest
C. Variations
D. Enormous rate of production

Answer

**Step-by-step Solution:**

1. **Understanding Darwinism**: Darwinism, or the theory of evolution by natural selection, posits that species evolve over time through a process where individuals with favorable traits are more likely to survive and reproduce.

2. **Identifying the Weakness**: The question asks for the weakest point of Darwinism. While Darwin's theory explained the mechanisms of natural selection and adaptation, it did not adequately address the origin of variations within species.

3. **Evaluating the Options**: The options provided are:
- A) Struggle for Existence
- B) Survival of the Fittest
- C) Variation
- D) Enormous Rate of Production

4. **Analyzing Each Option**:
- A) Struggle for Existence: This concept is well-explained in Darwinism as it relates to competition among species.
- B) Survival of the Fittest: This phrase summarizes the outcome of natural selection, which is also well-covered in Darwin's theory.
- C) Variation: This is the key point where Darwinism is seen as weak. Darwin did not explain how variations arise in the first place.
- D) Enormous Rate of Production: This is a characteristic of many species and is acknowledged in Darwin's theory.

5. **Conclusion**: The weakest point of Darwinism is that it had no explanation for the origin of variation. Therefore, the correct answer is **Option C: Variation**.

---