#lemmatization

Question 1: Single choice

After stemming, text can become hard to read: "located" turns into "locat" and "beautiful" into "beauti". Why does this happen?

Stemming maps each word to its dictionary base form, which drops tense and number1
Stemming crudely chops off affixes, and the stems it leaves are often not real words2
Stemming removes stop words, so the sentence loses its function words3
Stemming splits each word into subword tokens, which are then shown separately4