Which sentence has correct subject-verb agreement?
1 marking up the text during reading is necessary for critical thought and and help readers make connections to what they read?
2 marking up the text during reading is necessary for critical thought and help readers make connections to what they read.
3 marking up the text during reading are necessary for critical thought and help readers make connections to what they read.
4 marking up the text during reading are necessary for critical thought and help readers make connections to what they read.
witch one of those is it?
