Which of the following food items is/are not preferable for mountaineering?

Mountaineering is a very strenuous activity and certain foods need to be compulsorily in the mountain climbers' diet to complete their goal. Option A, chanas or chickpeas are rich in protein and give us energy to power through the day. Option B, glucose biscuits also give us instant energy. But the food item in option C, pizza is a greasy food with excessive fat nutrients, which will slow down us. So option C is not preferable for mountaineering.