Final answer:
Strips are often made of metal, smartphones are mainly composed of plastic polymers and silicon for electronics, and grits are made from corn, which makes option A) Metal, plastic, and corn the correct answer.
Step-by-step explanation:
The question asks for the composition of strips, a phone, and grits. Strips can be made of various materials, but if we consider 'strips' in general terms, like magnetic strips, they could be made of a magnetized material, which usually contains metal. When it comes to a phone, and considering modern smartphones, they're primarily built with plastic (polymers like ABS or polycarbonate for the case) and silicon and other metals for the internal electronic components. Lastly, grits are a food substance made from corn.
Based on this information, the correct answer would be A) Metal, plastic, and corn.