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.
amazing, lovely, superb, adequate, superlative
poor, inferior, atrocious, dreadful, inadequate
The best option is D studied.
This word denotes a measured, even-handed approach to the issue. So, it should be :Current immigration policy must be studied before new proposals can be made.
1. Most is describing the amount of water
2. Salty continues to refer to the water
3. Frozen is also describing the water.
4. Only is refering to percentage
5. Tiny is talking about percentage