You did not include options in your question, but based on the meaning of the word cryptic, your answer will be 'A HIDDEN MEANING'.
When you say that something is cryptic, it means that, that thing has a meaning that is mysterious or obscure.
From the way the word was used in the given sentence, it means that the message the teacher was passing across about the test is hidden, it was not understood by any of the students.
Match these items.
1. tone - the attitude of a piece of writing
2. theme - the main idea of a text
3. motif - a distinctive feature in a text
4. imagery - visually descriptive language
5. Shakespearean sonnet - a poem with fourteen lines
Answer:
The inventor initially struggled to solve the problem, but she discovered an ingenious solution.
Explanation:
I took the test on Edge.