Evaporated milk formula makes the most work for the infants.

Similar to condensed milk, and as the name implies, evaporated milk is also made by heating milk until about 60 percent of its water content has evaporated. It is then homogenized, packaged, and sterilized. The result is a dense, creamy, ultra-concentrated milk that can be canned and stored for several months. Start was billed as the first predigested, whey-based infant formula designed for the routine feeding of babies who may be allergic to standard cow`s milk-based formulas or soy-based formulas. The other Carnation infant product, Good Nature, contains protein and extra calcium.

Answerfarmer's market; (b) would be my second choice