Final answer:
Tara would likely turn to personal promotion for a short-term stimulus in her firm's marketing efforts, as it provides immediate results through direct interactions.
option d is the correct
Step-by-step explanation:
When Tara needs to provide a short-term stimulus to her firm's marketing efforts, the most likely tool she would turn to is personal promotion. Personal promotion involves direct efforts such as sales calls, networking, and other one-on-one interactions that can lead to immediate results and is particularly effective in providing a quick boost in marketing activities.
This contrasts with options like institutional advertising, which builds the brand over the long term; primary demand, which is about creating demand for an entire category of products rather than a specific brand; and selling proposition, which is more about the strategic positioning of the product in the market.