What is the singular version of criteria, and why is it irregular? A.

Criterion is the singular version, and it is irregular because it is a Greek word in which the –on is changed to –a in its plural form.

B.

Criteris is the singular version, and it is irregular because it is a Greek word in which the –is is changed to –a in its plural form.

C.

Criterium is the singular version, and it is irregular because it is a Greek word in which the –um is changed to –a in its plural form.

D.

Criterion is the singular version, and it is irregular because it is a Latin word in which the –on is changed to –a in its plural form.

A.  Criterion is the singular version, and it is irregular because it is a Greek word in which the –on is changed to –a in its plural form.

Explanation:

"Criteria" is the irregular plural form for the word "criterion", which means a principle, benchmark or standard by which something is judged. "Criterion" is a Greek word, which is why it has this irregular plural. Another Greek word that has the same -on ending and uses the same -a plural is "phenomenon"/"phenomena". With that in mind, we can safely choose letter A as the correct option.

a-he encouraged islamic schools to introduce greek texts.

d-he invited greek scholars to teach their texts to the locals.

explanation:

the transmission of the greek classics to latin western europe during the middle ages was a key factor in the development of intellectual life in western europe.[1] interest in greek texts and their availability was scarce in the latin west during the earlier middle ages, but as traffic to the east increased so did western scholarship.

mark brainliest and have a great day!

- "the answers are a and b.  

when cullen speaks of planting while others reap, and standing "abject and mute," he is speaking about the racial injustices present in american society. as these injustices have changed over time, the american identity  has also shifted. those changes are, in turn, reflected in american literature."