In each of the questions given below, two columns are presented, each containing three phrases. Choose the option that correctly connects the phrases from Column I with those from Column II to form grammatically and contextually meaningful sentences. If none of the given options correctly represents all valid connections, choose "None of the above." 

A-F: Network effects connect with F — the mechanism by which early-mover platform advantages compound into structural entry barriers. Network effects are precisely the dynamic through which platform dominance becomes self-reinforcing and entrenched.   B-E: Algorithmic pricing systems connect with E — dynamically adjusting prices based on demand surges and user vulnerability. Real-time algorithmic pricing using demand and behavioural data is exactly what the ride-hailing and e-commerce sectors have deployed and what consumer protection agencies have struggled to regulate.   C-D: Data portability connects with D — reducing switching costs by enabling data transfer between competing platforms. Data portability is the regulatory instrument specifically designed to address lock-in effects in digital markets.   Options (a), (b), and (c) pair these elements incorrectly — A-D, B-F, A-E, C-F, B-D, and C-E all produce contextually inverted or incongruous sentences. Hence (d).