From the information given,
angle B is congruent to angle E
angle C is congruent to angle F
line BC is congruent to line EF
One of the rules for congruent triangles states that
if any two angles and the side included between the angles of one triangle are equivalent to the corresponding two angles and side included between the angles of the second triangle, then the two triangles are said to be congruent by ASA(Angle side angle) rule
By analysing the given information,
line BC is between angles B and C in triangle ABC
line EF is between angles E and F in triangle DEF
Thus, both triangles are congruent by the ASA rule
The correct option is
B. congruent - ASA