French tarragon a desirable culinary herb If the information presented is true, which of the following can most reliably be concluded on the basis of it?

　　As a decorative plant, French tarragon is more desirable than Russian tarragon.

　　The flowers of Russian tarragon plants are probably not flavorful.

　　Plants that grow from seeds sold in a packet labeled tarragon are not French tarragon.

　　There are no other kinds of tarragon besides Russian tarragon and French tarragon

　　Garden plants that have flavorful leaves generally do not produce flowers.

　　10. In the United States, the financing of industrial research by private industrial firms remained steady as a percentage of sales during the period between 1968 and 1978 . But slowdowns in the growth of industrial productivity also occurred during that period, a fact that refutes the notion that the growth of industrial productivity is directly proportional to the amount invested in industrial research.

　　Which of the following, if true for the United States,most weakens the argument above?

　　Federal funds, which constituted a significant portion of the support for industrial research from 1968 to 1978, fell annually and substantially during that period.

　　The inflation that occurred between 1968 and 1978 was more severe than leading economists had expected.

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