Cross off the choices you know are wrong. The remaining ones are easier to compare, and a guess among two is better than a guess among four. Digital flagging is in flagging questions.
Eliminate, then pick
Answer masking hides choices instead of marking them, in answer masking. Strikethrough on the passage is a different tool, in strikethrough.
The review screen still shows what is unanswered, in the review screen.
The bottom line
Mark the dead choices. Guess from what is left, then move.
Start practicing
Start with a free diagnostic, then drill your weak spots with 15-question quizzes and track how you're doing across Reading, English, and Math. Compare plans whenever you're ready to go further.
This article offers general ACT prep guidance. The ACT can change from year to year, including its format, scoring, policies, test dates, and fees, so always confirm the latest details on the official ACT website at act.org before you make decisions. ACT® is a registered trademark of ACT, Inc. thirty-six is not affiliated with, endorsed by, or sponsored by ACT.