Final answer:
A majority of Americans are indeed Protestants, as Protestant denominations form the largest group within American Christianity, and Evangelical Protestants represent a significant presence.
Step-by-step explanation:
The student's question asks whether a majority of Americans practice some form of Protestantism. This is true. The largest group of Christians in the United States are members of Protestant denominations, which includes a variety of churches such as Baptist, Episcopal, Lutheran, Methodist, Pentecostal, and others. Additionally, Evangelical Protestants represent the second largest group of American Christians and have a significant presence, particularly in the Deep South and Appalachia. It's important to also note that American Christianity is diverse and there are regional differences, with a historical prevalence of English-speaking Protestants due to early immigration from the British Isles.