Answer:
According to President Dwight D. Eisenhower's Citation, the following statement was not a <em>step</em> that Dr. Salk took to assist foreign countries "<em>Dr. Salk has traveled and given the polio vaccine to children in foreign countries</em>."
Explanation:
We need to examine each step given in the options and compare them to those reported in President Dwight D. Eisenhower's Citation.
By the way, it is also important to notice that all statements in President Eisenhower's Citation are there to reinforce the argument that he was proud that of Dr. Salk's work reaching beyond the United States.
<h3>Comparison of statements</h3>
"Dr. Salk has assisted foreign countries by providing technical information." This step is described in the Citation as "By helping scientists in other countries with technical information."
"Dr. Salk has helped foreign countries begin to produce the vaccine themselves." This step is expressed in the Citation as "By offering to them the strains of seed virus and professional aid so that the production of vaccine can be started by them everywhere."
"Dr. Salk has offered foreign scientists the opportunity to tour his laboratory." This step is reported in the Citation as "By welcoming them to his laboratory that they may gain a fuller knowledge."
"Dr. Salk has traveled and given the polio vaccine to children in foreign countries." There is <em>no mention</em> of this into President Eisenhower's Citation.
So, "Dr. Salk has traveled and given the polio vaccine to children in foreign countries" cannot be considered as a step to assist foreign countries in using the vaccine to prevent paralytic poliomyelitis, according to President Eisenhower's Citation.