The word which replaces "stingy" to make the sentence more positive will be economical. Thus, the correct answer is A.
What is Economical?
The term economical refers to the value of goods in exchange for money or items which help to manage expenses carefully in a time-efficient manner without making unnecessary wastage.
In the given option cheap, penny-pinching, and tight-fisted created a negative impression whereas economical creates a positive and formal impression.
Therefore, option A economical is the appropriate answer.
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