Complex sentence: Applicants to Middlebury must submit standardized test scores, but are given the option of submitting either the SAT I, the ACT, or three SAT II subject tests in different areas of study.
Split into simpler sentences: Applicants to Middlebury must submit standardized test scores, but are given the option of submitting either the SAT I or the ACT. Applicants must also submit three SAT II subject tests in different areas of study.