A state-transition can be expressed as follows:
S_i - E_m/A_n - S_j
Where S_i is the i-th state, S_j is the j-th state (with j not necessarily different from i), E_m is the m-th event (input) and A_n is the n-th action (output).
Which of the following statements regarding State-Transition testing coverage criteria is correct?

Question

A state-transition can be expressed as follows: 
 S_i -> E_m/A_n -> S_j 
 Where S_i is the i-th state, S_j is the j-th state (with j not necessarily different from i), E_m is the m-th event (input) and A_n is the n-th action (output). 
 Which of the following statements regarding State-Transition testing coverage criteria is correct?

Answer

Covering all states is at least as strong a criterion than covering all state-transitions.

Answer

Covering all state-transitions is at least as strong a criterion than covering all events.

Answer

Covering all states is at least as strong a criterion than covering all events.

Answer

Covering all state-transitions is at least as strong a criterion than covering all states.

Crowdly

A state-transition can be expressed as follows: S_i -> E_m/A_n -> S_j Where ...

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