Which of these sounds are alveolar consonants? a) /t/ and // ...

[Chelseaamend]

Which of these sounds are alveolar consonants?
 
  a) /t/ and //
  b) /t/ and /s/
  c) /d/ and /m/
  d) /k/ and /g/

Question 2

Consonant sounds are normally classified on the basis of
 
  a) place and manner of articulation and voicing
  b) voicing, alveolar interference, and articulatory difficulty
  c) stops, glides, and contrasts
  d) phonetic detail, specificity, and voicing

[Carliemb17]

Answer to Question 1

b

Answer to Question 2

a