Explanation:

All three mentioned activities are indeed discussed in the context of carbon capture and sequestration (CCS) or carbon removal.

Spreading finely ground basalt rock on farmlands extensively: This is known as "enhanced rock weathering". When silicate or carbonate minerals, like basalt, chemically weather, they react with CO2 and convert it to a solid mineral, storing it indefinitely.

Increasing the alkalinity of oceans by adding lime: By adding alkaline substances, such as lime, to the ocean, you can increase the ocean's capacity to absorb and sequester CO2. This method aims to speed up a natural process where CO2 reacts with seawater and forms solid carbonate minerals.

Capturing carbon dioxide released by various industries and pumping it into abandoned subterranean mines in the form of carbonated waters: This is a form of geologic carbon sequestration. Captured CO2 can be injected deep underground, where it reacts with the surrounding rock and becomes solid over time.

Given that all these methods are considered for carbon capture and sequestration, the correct answer is "All three".