Answer:
The correct option is A
Explanation:
From the question we are told that
The velocity of the spy relative to the carrier is [tex]v_s = -4 \ m/s[/tex]
The velocity of the aircraft carrier is [tex]v_a = 12 \ m/s[/tex]
Generally the velocity of the spy according to the person standing stationary on the beach is mathematically represented as
[tex]v = v_s + v_a[/tex]
[tex]v = -4 + 12[/tex]
[tex]v = 8 \ m/s[/tex]