A tender is a submission made by a prospective supplier in response to an invitation to tender. It makes an offer for the supply of goods or services. In construction, the main tender process is generally for the selection of the contractor that will construct the works.
Tendering Process under construction is a process of submitting a proposal to undertake government construction projects. Depending on the language in the bid proposal the construction companies make their bids for submission, and if accepted, a legally enforceable contract is created.23 Mar 2017
I would say the correct answer is "octane". It is important that you use the fuel with the correct octane rating recommended by the manufacturer. Among the choices it is only octane that is used as a rating for fuels. Hope this helps.