What does "kind of interest" mean?

[Yordan]

Business English Lesson, Advanced Level

ESL/EFL Test #547 "Distribution Compliance Period", question 1

A one-year distribution compliance period is imposed on Regulation S shares, restricting them from being traded with US citizens on US markets, following the ......... date of the security.

(a) compliance
(b) interest
(c) issue
(d) term

Business English Lesson, Advanced Level

ESL/EFL Test #547 "Distribution Compliance Period", answer 1

A one-year distribution compliance period is imposed on Regulation S shares, restricting them from being traded with US citizens on US markets, following the issue date of the security.

Correct answer: (c) issue
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what kind of interest does it mean?

[Mister Micawber]

It doesn't mean any specific kind of interest. 'Interest' is an incorrect answer.
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Native English teacher at Mister Micawber's

[Yordan]

Thankyou for your explanation Sir,