How Many of the Following Will Raise the PH of a Weak

How many of the following will raise the pH of a weak acid HA in aqueous solution?
I.addition of water
II.making a buffered solution by adding NaA(s)
III.addition of NaCl(s)
IV.addition of HNO₃
V.titrating with KOH

A) 1
B) 2
C) 3
D) 4
E) 5