**Core Concept**
Exclusive breastfeeding is recommended for the first six months of life to provide optimal nutrition and promote healthy growth and development in infants. This period allows for the establishment of a strong gut microbiome, enhances the development of the infant's immune system, and provides numerous health benefits for both the mother and the baby.

**Why the Correct Answer is Right**
The World Health Organization (WHO) and the American Academy of Pediatrics (AAP) recommend exclusive breastfeeding for the first six months of life. During this period, breast milk provides all the necessary nutrients, vitamins, and minerals for growth and development. Exclusive breastfeeding also offers protection against infections, reduces the risk of allergies, and supports the development of a healthy gut microbiome. The benefits of exclusive breastfeeding continue beyond six months, but the nutritional needs of the infant change as they start to introduce solid foods.

**Why Each Wrong Option is Incorrect**
**Option A:** Six weeks is too short a period for exclusive breastfeeding, as it does not allow for the establishment of a strong gut microbiome and optimal immune system development.
**Option B:** Twelve months is longer than recommended, as the nutritional needs of the infant change after six months, and solid foods should be introduced to provide essential nutrients.
**Option C:** Two months is also too short a period for exclusive breastfeeding, as it does not allow for the full benefits of breastfeeding to be realized.

**Clinical Pearl / High-Yield Fact**
Remember that exclusive breastfeeding for the first six months is recommended to provide optimal nutrition and promote healthy growth and development in infants. However, it is essential to introduce solid foods at six months to ensure the infant's nutritional needs are met.

**Correct Answer: C. Six months**