Count and noncount nouns a. refer to things that can or cannot ...

[Frost2351]

Count and noncount nouns
 
  a. refer to things that can or cannot be counted, such as apples or milk.
  b. can both be preceded by numbers or the articles a or an.
 c. include two-way nouns, depending on their context.
 d. both a and c

Question 2

Some examples of tricky plurals include
 
  a. changing y to i and adding -es in nouns that end in y after a consonant, as in city/cities.
 b. changing f or fe to a v and adding -es to most singular common nouns that end in f or fe, as seen in life/lives.
  c. making compound nouns plural by adding -s or -es on the most important word, as seen in mothers-in-law/well-wishers.
  d. all of the above

[Edwyer]

Answer to Question 1

d

Answer to Question 2

d

[Frost2351]

Gracias!

[mochi09]

Excellent