Information: - The Dartford-Thurrock River Crossing, commonly known as the Dartford Crossing and until 1991 the Dartford Tunnel, is a major road crossing of the River Thames in England, carrying the A282 road between Dartford in Kent to the south with Thurrock in Essex to the north. It consists of two bored tunnels and the cable-stayed Queen Elizabeth II Bridge. The only fixed road crossing of the Thames east of Greater London, it is the busiest estuarial crossing in the United Kingdom, with an average daily use of over 130,000 vehicles. It opened in stages: the west tunnel in 1963, the east tunnel in 1980 and the bridge in 1991. The crossing, despite not being under motorway restrictions, is considered part of the M25 motorway's route, using the tunnels northbound and bridge southbound. Described as one of the most important road crossings in Britain, it suffers from heavy traffic and congestion. - The Dartford Cable Tunnel is an 11,000,000 tunnel upstream of the Dartford Crossing built in 2003 - 4 . Its diameter is ~ 3m . It is designed to carry and allow for maintenance of 380kV National Grid electrical cable beneath the Thames ; it is accessible by foot as a crossing of the Thames , but by authorised personnel only . - Dartford is the principal town in the Borough of Dartford, Kent, England. The town is situated on the border of Kent and Greater London, bordering the London Borough of Bexley. It also borders the Borough of Thurrock, Essex, via the Dartford Crossing of the River Thames and Gravesham to its east. - The River Thames is a river that flows through southern England. At , it is the longest river entirely in England and the second longest in the United Kingdom, after the River Severn. It also flows through Oxford (where it is called Isis), Reading, Henley-on-Thames and Windsor. The lower reaches of the river are called the Tideway, derived from its long tidal reach up to Teddington Lock. It rises at Thames Head in Gloucestershire, and flows into the North Sea via the Thames Estuary. The Thames drains the whole of Greater London. After reading the paragraphs above, we are interested in knowing the entity with which 'dartford cable tunnel' exhibits the relationship of 'crosses'. Find the answer from the choices below. Choices: - river thames - severn
Answer:
river thames