Answer;
The experiment would lack a control group
Explanation;
-An experiment deliberately imposes a treatment on a group of objects or subjects in the interest of observing the response.
-Experimental design involves taking time and effort to organize the experiment properly to ensure that the right type of data, and enough of it, is available to answer the questions of interest as clearly and efficiently as possible.
-A scientific control is an experiment or observation designed to minimize the effects of variables other than the independent variable. This increases the reliability of the results, often through a comparison between control measurements and the other measurements.