Answer: A) The newspaper my dad reads is a worthy source of information.
Explanation: an affix is an addition to the base form or stem of a word in order to modify its meaning or create a new word. If the affix is at the beginning of a word, it is called a prefix, and if it is at the end of a word, it is called a suffix. The suffix -ible means "able to be", "relevant or suitable to, in accordance with", or expressing capacity or worthiness, so in the given sentence the word "credible" means "worthy."