Suppose You Obtained the Following Results in a Multiple Baseline $\begin{array} { l l l l l l l l l l l l l } \mathrm { Al } : & 4 & 4 & 4 & \mathrm {~B} 1 : & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 \end{array}$

Multiple Choice

Suppose you obtained the following results in a multiple baseline design assessing the impact of family therapy on tantrums,chores,and truancy in treating one child and his parents.Which interpretation(s) is(are) plausible?
Number of tantrums:
$\begin{array} { l l l l l l l l l l l l l } \mathrm { Al } : & 4 & 4 & 4 & \mathrm {~B} 1 : & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 \end{array}$
Number of chores performed:
A2: $\begin{array} { l l l l l l l l l l l l } 3 & 0 & 0 & 3 & 3 & \text { B2: } & 3 & 3 & 3 & 3 & 3 & 3 \end{array}$
Number of days truant:
$\begin{array} { l l l l l l l l l l l l } \text { A3: } & 4 & 4 & 4 & 0 & 0 & 0 & 0 & \text { B3: } 0 & 0 & 0 & 0 \end{array}$

A) History could have caused the change.
B) The intervention may have had generalizable effects.
C) History could have caused the change or the intervention may have been effective, with generalizable effects.
D) none of these.