Answer:Select the abbreviation that tells how the italicized noun clause is used. ... Select the abbreviation that tells how the italicized noun clause is used. S-subject, DO-direct object, SC-subject complement, OP-object of preposition. The valedictory prize will be awarded to"whoever has the highest academic rating."
To mark an inference means to figure out the hidden meaning of a text.
Explanation: To make an inference means to try to make a conclusion about something based on what you observe or your previous knowledge. So, if someone makes an inference about a text it means that s/he is trying to understand what the hidden meaning of it is.